/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertSyncArchives.h
Most of the time, FObjectPtrs are serialized as UObject*, but some archives need to override this.
This instance.
virtual [FArchive](API\Runtime\Core\Serialization\FArchive) & operator<< ( [FObjectPtr](API\Runtime\CoreUObject\UObject\FObjectPtr) & Value )